[Mod] only allow 1 thread to query rqdata
[Mod] only allow 1 thread to query rqdata

msincenselee/vnpy,bigdig/vnpy,bigdig/vnpy,msincenselee/vnpy,msincenselee/vnpy,bigdig/vnpy,vnpy/vnpy,bigdig/vnpy,vnpy/vnpy,msincenselee/vnpy